List five-letters words such that after erasing two letters only one is left.
(In reply to
supplement to the "computer solution" by Dej Mar)
Well, Dej Mar has opened the door to other languages.
In which case the remaining three letters could be:
een (Dutch)
ein (German)
uno (Italian, Spanish)
ena (Slovenian)
man (Swedish)
And those are just the European languages!